Any physical activity is better late than never but earlier in older age, better still

Twenty minutes of daily moderate to vigorous exercise in early old age (70-75) may best stave off major heart disease, including heart failure, in late old age (80+), a new study has suggested.

The findings of the research published online in the journal Heart, reinforce the maxim of ‘better late than never,’ when it comes to exercise, but earlier on in older age is better still, concluded a linked editorial in the same journal.

It’s no secret that physical activity is associated with a lower risk of cardiovascular disease and a longer life, irrespective of gender and ethnicity, with the benefits accruing in tandem with the effort expended.

But relatively few studies have looked exclusively at whether exercise in later life can help ward off heart disease and stroke in old age.

To plug this knowledge gap, researchers from Italy drew on data from a study of 3,099 older Italians (65 and above).

Initial assessments, including a detailed medical history, physical examination, scans, and a battery of blood tests were carried out between 1995 and 1997, with two further assessments 4 and 7 years later.

At the start of the study, women were more likely than men to have 4+ coexisting conditions, with a higher prevalence of osteoarthritis, osteoporosis, and chronic kidney disease; chronic obstructive pulmonary disease (COPD) and diabetes were more common among the men.

Participants filled in questionnaires on their physical activity levels at each of the time points. Moderate physical activity included walking, bowls, and fishing, while vigorous physical activity included gardening, gym workouts, cycling, dancing, and swimming.

Those whose physical activity added up to 20 or more minutes a day were defined as active; those who clocked up less than this were defined as inactive. Men were more likely to be physically active than women.

Other potentially key background information on household income, educational attainment, number of household members, and smoking and drinking was also collected.

The health of all the participants was then tracked through linkage to hospital discharge records and death certification up to the end of December 2018. The final analysis included 2,754 participants with complete data, of whom 1,398 were women.

During the monitoring period, 1,037 new diagnoses of heart disease, heart failure, and stroke were made.

Increasing levels of physical activity as well as maintaining an active lifestyle over time were associated with lower risks of cardiovascular disease and death in both men and women.

The largest reduction in risk was observed for new cases of coronary heart disease and heart failure in late old age. No significant association between physical activity and stroke was observed.

Most of the participants had stable active physical activity patterns over time. Patterns of stable-high physical activity were associated with a significantly (52%) lower risk of cardiovascular disease among men compared with those with stable-low patterns.

The greatest benefits seemed to occur at the age of 70. Risk was only marginally lower at the age of 75, and no lower at the age of 80-85, suggesting that improving physical activity earlier in old age might have the most impact, say the researchers.

A J-shaped curve for exercise length was also observed, with the sharpest reduction in heart disease and heart failure associated with a period of between 20 and 40 minutes of moderate to vigorous physical activity every day.

While the observed associations were strongest among men, the researchers emphasised: “Women doing more physical activity had consistently lower incidence rates of almost all cardiovascular outcomes despite the fact that the risk reduction did not reach statistical significance, but when considering overall mortality, risks were significantly reduced.”

This is an observational study, and as such, can’t establish cause. The researchers acknowledged that the study relied on participant recall, that physical activity levels were subjectively assessed, and that no data were available on mid-life physical activity levels, all of which might have influenced cardiovascular risk profiles in late life.

Nevertheless, they concluded: “These results suggest that public health policies should be targeted at promoting or beginning physical activity in mid- and early late life, given a probable greater effectiveness in reducing cardiovascular risks.

“At least 20 minutes of moderate to vigorous physical activity per day should be recommended to achieve the greatest cardiovascular benefits.”

Commenting Dr Angie Brown, Medical Director of the Irish Heart Foundation said, ”The risk of a sedentary lifestyle and conversely the benefits of regular physical activity are well known. This study confirms this but importantly shows the benefits of an active lifestyle also occur in older individuals, reducing the risk of cardiovascular disease and heart failure in this group. It’s therefore important that we continue to promote moderate physical activity of at least 20 minutes a day no matter what the age.”

(Association of physical activity trajectories with major cardiovascular diseases in elderly people doi 10.1136/heartjnl-2021-320013)